JP2002011314A - Plastic filter for water cleaner prefilter, its production method, and cleaner prefilter - Google Patents
Plastic filter for water cleaner prefilter, its production method, and cleaner prefilterInfo
- Publication number
- JP2002011314A JP2002011314A JP2000196947A JP2000196947A JP2002011314A JP 2002011314 A JP2002011314 A JP 2002011314A JP 2000196947 A JP2000196947 A JP 2000196947A JP 2000196947 A JP2000196947 A JP 2000196947A JP 2002011314 A JP2002011314 A JP 2002011314A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- water purifier
- prefilter
- plastic
- plastic filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、浄水器プレフィル
タ用プラスチックフィルタに関し、詳しくは家庭や事業
所等で使用されている水道水内の比較的大きな塵埃や赤
錆等を有効に分離濾過するための浄水器プレフィルタ用
プラスチックフィルタ、その製造方法及び浄水器プレフ
ィルタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic filter for a prefilter for a water purifier, and more particularly to a method for effectively separating and filtering relatively large dust, red rust, and the like in tap water used in homes and offices. The present invention relates to a plastic filter for a water purifier pre-filter, a method for manufacturing the same, and a water purifier pre-filter.
【０００２】[0002]
【従来の技術】昨今の水質悪化や健康指向等の理由でい
わゆるおいしい水、安全な水への要望が高く、家庭や事
業所等では水道水内の塵埃、赤錆、各種細菌類等の不純
物を分離濾過するため浄水器の設置が普及している。上
記不純物を除去するフィルタとしては中空糸膜を用いた
管状モジュールタイプが一般的であるがこのフィルタは
大きさが０．１〜数μｍの細菌類をも除去することを目
的としているので一般的にその孔径は０．１μｍ以下と
なっている。2. Description of the Related Art There is a high demand for so-called delicious water and safe water due to recent deterioration in water quality and health orientation, and households and business offices have to remove impurities such as dust, red rust and various bacteria in tap water. The installation of water purifiers for separating and filtering is widespread. As a filter for removing the above impurities, a tubular module type using a hollow fiber membrane is generally used. However, since this filter is intended to remove bacteria having a size of 0.1 to several μm, it is generally used. The pore size is 0.1 μm or less.
【０００３】一方、細菌類以外の例えば砂などの塵埃や
赤錆などは通常１０μｍ以上のものが殆どであり、その
ような大きな不純物まで孔径の小さな中空糸膜で捕捉す
ると、すぐに目詰まりを起こし寿命が極端に短くなる等
の不具合が発生する場合がある。このような不具合を解
決する手段として中空糸膜の前に砂や赤錆等の比較的大
きな不純物の除去を目的とした不織布、ポリウレタン多
孔体、金属焼結体などを用いたプレフィルタを設置する
方法が取られている。On the other hand, dust other than bacteria, for example, dust such as sand, red rust, etc., is usually almost 10 μm or more. When such a large impurity is captured by a hollow fiber membrane having a small pore diameter, clogging occurs immediately. Problems such as extremely short life may occur. As a means for solving such a problem, a method of installing a pre-filter using a nonwoven fabric, a polyurethane porous body, a metal sintered body or the like for the purpose of removing relatively large impurities such as sand and red rust in front of the hollow fiber membrane. Has been taken.
【０００４】[0004]
【発明が解決しようとする課題】このプレフィルタとし
て本発明者らは低密度、あるいは高密度ポリエチレンや
ポリプロピレンなどのポリオレフィン系の材料を金型内
に充填し、樹脂の融点付近まで金型を加熱し粒子表面の
みを融着する、いわゆる型内焼結法で成形したプラスチ
ックフィルタをケーシング内に設置したものを検討し
た。このような方法でプレフィルタを成形する際は通
常、生産性を考えてプレフィルタ用のプラスチックプレ
フィルタの寸法よりも数倍〜数十倍程度長い金型を用い
て焼結成形を行い、その後所定の寸法に切断してプレフ
ィルタ用として供することが考えられた。As a pre-filter, the present inventors fill a mold with a low-density or high-density polyolefin material such as polyethylene or polypropylene and heat the mold to near the melting point of the resin. A plastic filter molded by a so-called in-mold sintering method, in which only the particle surface is fused, was installed in a casing. When molding a pre-filter by such a method, usually, in consideration of productivity, sinter molding is performed using a mold that is several times to several tens times longer than the dimensions of the plastic pre-filter for the pre-filter, and then It has been considered that the sheet is cut into a predetermined size and used as a pre-filter.
【０００５】しかしながら、このような方法で成形した
材料は原料の自重等の関係で型内の長さ方向でフィルタ
の密度が異なるため、結果として気孔率や圧力損失、ひ
いては不純物の捕集性能にもバラツキが見られ、圧力損
失が高いために使用している際にプラスチックフィルタ
を挿入しているケーシングが破損したり、孔径が大きす
ぎて要求される捕集性能が発現出来ない等の問題があっ
た。[0005] However, in the material molded by such a method, the density of the filter varies in the longitudinal direction in the mold due to the weight of the raw material and the like, and as a result, the porosity, pressure loss, and consequently the impurity collecting performance are reduced. There is also a problem that the casing in which the plastic filter is inserted is damaged during use due to high pressure loss, and the required collecting performance cannot be exhibited due to the hole diameter being too large. there were.
【０００６】[0006]
【課題を解決する手段】本発明は鋭意検討の結果、上記
課題を解決できる良好で安定した濾過精度を有する浄水
器プレフィルタ用プラスチックフィルタを見出したもの
である。Means for Solving the Problems As a result of intensive studies, the present invention has found a plastic filter for a water purifier pre-filter, which can solve the above-mentioned problems and has good and stable filtration accuracy.
【０００７】その要旨は熱可塑性プラスチック材料を焼
結した多孔質フィルタであって、気孔率が２０〜６０ｖ
ｏｌ％で、濾過精度が５〜１００μｍであり、乾式通気
量１０ｍ３／ｍ２・ｍｉｎ時の圧力損失が２０〜６００
ｍｍＡｑ以下であることを特徴とする浄水器プレフィル
タ用プラスチックフィルタである。The gist of the invention is a porous filter obtained by sintering a thermoplastic material, which has a porosity of 20 to 60 v.
ol%, the filtration accuracy is 5 to 100 μm, and the pressure loss at a dry ventilation rate of 10 m 3 / m 2 · min is 20 to 600.
It is a plastic filter for a water purifier pre-filter characterized by being not more than mmAq.
【０００８】および上記のプラスチックフィルタを構成
する材料が超高分子量ポリエチレンであることを特徴と
する浄水器プレフィルタ用プラスチックフィルタであ
る。A plastic filter for a prefilter for a water purifier, wherein the material constituting the plastic filter is ultra-high molecular weight polyethylene.
【０００９】および成形方法としては、円筒形状の開口
を有する口金を設けたスクリュー式、あるいはラム押出
機を利用し、連続多孔質体を形成することを特徴とする
浄水器プレフィルタ用プラスチックフィルタの製造方法
である。As a molding method, there is provided a plastic filter for a water purifier prefilter characterized by forming a continuous porous body by using a screw type or a ram extruder provided with a base having a cylindrical opening. It is a manufacturing method.
【００１０】および設置方法としては、浄水器の流入配
管側に、接続できるケーシングの内部にプラスチックフ
ィルタの流入側を流入側エンドキャップで封止し、流出
側に流出側エンドキャップで開口状態に固定して、入水
がプラスチックフィルタの筒外から筒内方向に通過する
際に比較的大きな不純物を濾過することを特徴とする浄
水器プレフィルタである。[0010] As an installation method, the inflow side of the plastic filter is sealed with an inflow end cap inside the connectable casing on the inflow pipe side of the water purifier, and is fixed to the outflow side with an outflow end cap in an open state. A water purifier prefilter characterized in that relatively large impurities are filtered when water enters the plastic filter from outside the cylinder to inside the cylinder.
【００１１】本発明の浄水器プレフィルタ用プラスチッ
クフィルタは後述する方法により求めた気孔率が２０〜
６０ｖｏｌ％で、濾過精度は５〜１００μｍであり、乾
式通気量１０ｍ３／ｍ２・ｍｉｎ時の圧力損失が２０〜
６００ｍｍＡｑ以下であるので、浄水器の手前のプレフ
ィルタのケーシング内に設置した場合に、安定的に１０
μｍ以上の塵を捕集でき、浄水器の目詰まりを防ぐこと
ができる。The plastic filter for a water filter prefilter of the present invention has a porosity of 20 to 20 determined by a method described later.
At 60 vol%, the filtration accuracy is 5 to 100 μm, and the pressure loss at a dry ventilation rate of 10 m 3 / m 2 · min is 20 to
Since it is 600 mmAq or less, when it is installed in the casing of the pre-filter in front of the water purifier, it can stably be 10 mmAq.
Dust of more than μm can be collected and clogging of the water purifier can be prevented.
【００１２】[0012]
【発明の実施の形態】本発明の浄水器プレフィルタ用プ
ラスチックフィルタを構成する材料としてはポリエチレ
ン、ポリプロピレン等のポリオレフィン系樹脂、ポリア
クリル系樹脂、ふっ素系樹脂等のなかでメルトフローレ
イト（以下「ＭＦＲ」と記す）が小さく、比較的容易に
多孔質体を得られる材料であれば特に限定されるもので
はないが、これらの中でもＭＦＲが特に小さく、融点以
上の広範囲な温度領域でゴム上平坦部が認められ、粒子
間空隙の閉塞が起こりにくい超高分子量のポリエチレン
が均一な気孔径を有する浄水器プレフィルタ用プラスチ
ックフィルタを得る上では特に好適である。BEST MODE FOR CARRYING OUT THE INVENTION As a material constituting a plastic filter for a water filter prefilter of the present invention, a melt flow rate (hereinafter referred to as "polyolefin resin" such as polyethylene or polypropylene, polyacrylic resin or fluorine resin) is used. MFR) is not particularly limited as long as it is a material that can obtain a porous body relatively easily, but among these materials, the MFR is particularly small, and it is flat on rubber in a wide temperature range of the melting point or higher. Ultra-high molecular weight polyethylene in which pores are observed and in which pores between particles are not easily blocked is particularly suitable for obtaining a plastic filter for a water purifier prefilter having a uniform pore size.
【００１３】本発明の浄水器プレフィルタ用プラスチッ
クフィルタの気孔率としては２０〜６０ｖｏｌ％の範囲
であれば良く、好ましくは３５〜５０ｖｏｌ％のものが
好結果をもたらす。気孔率が２０ｖｏｌ％以下であると
乾式通気時の圧力損失は高くなり、湿式通水時の圧力損
失も同様に高くなるものと推測され、高通水量下での水
道水の送水が困難になったり使用中のケーシングが破損
する恐れがあり好ましくない。気孔率が６０ｖｏｌ％以
上では強度的に問題がありプレフィルタ自体が使用中に
破損する恐れがある。The porosity of the plastic filter for a water purifier prefilter of the present invention may be in the range of 20 to 60% by volume, and preferably 35 to 50% by volume provides good results. If the porosity is 20 vol% or less, it is estimated that the pressure loss during dry ventilation and the pressure loss during wet ventilation also increase, making it difficult to feed tap water under a high flow rate. It is not preferable because the casing in use may be damaged. If the porosity is 60 vol% or more, there is a problem in strength, and the prefilter itself may be damaged during use.
【００１４】そして濾過精度としては、５〜１００μｍ
の範囲であれば良く、好ましくは１０μｍのものが好結
果をもたらす。濾過精度が５μｍに満たないとプレフィ
ルタの粒子の補足量が増大し、プラスチックフィルタの
目詰まりが生じ易く、寿命が短くなることが推測され好
ましくない。濾過精度が１００μｍより大きいとプラス
チックフィルタの粒子の補足量が減少し、浄水器に目詰
まりが生じ易くプレフィルタの濾過性能上問題がある。The filtration accuracy is 5 to 100 μm
And preferably 10 μm gives good results. If the filtration accuracy is less than 5 μm, the amount of particles trapped in the pre-filter increases, and the plastic filter is liable to be clogged, which is presumed to shorten the life, which is not preferable. If the filtration accuracy is larger than 100 μm, the amount of particles trapped in the plastic filter is reduced, and the water purifier is likely to be clogged, which causes a problem in the filtration performance of the prefilter.
【００１５】さらに、圧力損失としては乾式通気量１０
ｍ３／ｍ２・ｍｉｎ時の圧力損失が２０〜６００ｍｍＡ
ｑであることが必要であり、好ましくは８０〜２００ｍ
ｍＡｑのものが好結果をもたらす。圧力損失が２０ｍｍ
Ａｑ以下では強度が弱くなり問題である。また６００ｍ
ｍＡｑ以上では通気抵抗が上昇することにより、通水時
の抵抗も上がるものと推測され、高通水量下での水道水
の送入が困難になったり使用中にケーシングが破損する
恐れがあり好ましくない。[0015] Further, the pressure loss is a dry air flow rate of 10
Pressure loss at m 3 / m 2 · min is 20 to 600 mmA
q, preferably 80 to 200 m
The one with mAq gives good results. Pressure loss is 20mm
Below Aq, the strength becomes weak, which is a problem. Also 600m
If the air flow resistance exceeds mAq, it is presumed that the resistance at the time of water flow increases due to the increase of the airflow resistance, which makes it difficult to supply tap water under a high water flow rate or the casing may be damaged during use. .
【００１６】本発明の浄水器プレフィルタ用プラスチッ
クフィルタの成形方法としては、例えば筒状等の内表面
形状を有する外型とその内部に挿入した同様の外表面形
状を有する内型とよりなる成形金型を用い、外型内表面
と内型表面の間隙部に形成されるキャビティ内にプラス
チック材料を充填した。成形法については前述した製品
のバラツキの問題や生産性の点であまり好ましくない。The method of forming a plastic filter for a prefilter for a water purifier according to the present invention is, for example, a method comprising forming an outer mold having a cylindrical inner surface shape and an inner mold having the same outer surface shape inserted therein. Using a mold, a plastic material was filled into a cavity formed in a gap between the inner surface of the outer mold and the surface of the inner mold. The molding method is not very preferable in terms of the above-described problem of product variation and productivity.
【００１７】従って成形法としては、（１）先端部に成
形型を有する温度調整が可能なシリンダ内に往復運動す
るピストン（プランジャーともいう）を内蔵したラム式
押出機を用いて行うラム押出法、（２）先端部に成形型
を有する温度調整が可能なシリンダ内にスクリューを内
蔵した射出成形機を用いて行う射出成形法、（３）先端
部に成形型を有する温度調整が可能なシリンダ内にスク
リューを内蔵した押出成形機を用いて行う押出成形法な
どの動的成形法が製造コストや生産効率、および品質の
バラツキの点から、好ましい。Therefore, the molding method is as follows: (1) A ram extruder using a ram extruder having a built-in reciprocating piston (also called a plunger) in a temperature-adjustable cylinder having a molding die at the tip end. (2) Injection molding method using an injection molding machine with a screw inside a temperature-adjustable cylinder having a mold at the tip, (3) Temperature control with a mold at the tip A dynamic molding method such as an extrusion molding method using an extrusion molding machine having a screw built in a cylinder is preferable from the viewpoint of manufacturing cost, production efficiency, and variation in quality.
【００１８】次に本発明の浄水器プレフィルタについ
て、図１に示す浄水器プレフィルタの断面の正面図に基
いて説明する。図１に示すように、浄水器のプレフィル
タ10の設置方法としては、図示しないが、浄水器の流入
水配管側に、砂や赤錆等の比較的大きな不純物の除去を
目的として設置する。浄水器プレフィルタ10 は、配管
の途中に設けたケーシング1 とプラスチックフィルタ2
とからなる。プラスチックフィルタ2 は筒状なので流入
側Ａに流入側エンドキャップ3 を嵌入して封止し、流出
側Ｂを流出側エンドキャップ4 で開口状態に固定をする
簡易なものである。このように設置することで流入水が
プレフィルタの筒外から筒内方向に通過する際に比較的
大きな不純物を濾過しつつ、開口状態の流出側Ｂから図
示しない浄水器に流入する構造としている。Next, the water purifier prefilter of the present invention will be described with reference to the front view of the cross section of the water purifier prefilter shown in FIG. As shown in FIG. 1, as a method of installing the prefilter 10 of the water purifier, although not shown, the prefilter 10 is installed on the inflow water pipe side of the water purifier for the purpose of removing relatively large impurities such as sand and red rust. The water purifier pre-filter 10 consists of a casing 1 and a plastic filter 2
Consists of Since the plastic filter 2 is cylindrical, the inflow end cap 3 is fitted into the inflow side A for sealing, and the outflow side B is fixed in an open state by the outflow end cap 4. With this arrangement, when the inflow water passes from the outside of the pre-filter to the inside of the pre-filter, it filters relatively large impurities, and flows into the water purifier (not shown) from the outflow side B in the open state. .
【００１９】[0019]
【実施例】以下、本発明の実施例を説明するが、本発明
は以下の実施例によりその範囲が限定されるものではな
い。なお、本発明における浄水器プレフィルタ用プラス
チックプレフィルタの性能は次の方法で評価または測定
し、その結果を表示した。EXAMPLES Examples of the present invention will be described below, but the scope of the present invention is not limited by the following examples. In addition, the performance of the plastic pre-filter for water purifier pre-filter in this invention was evaluated or measured by the following method, and the result was displayed.
【００２０】「気孔率／ｖｏｌ％」使用材料の真密度を
Ａｇ／ｃｍ３とし、本発明のプラスチックプレフィルタ
の見掛け密度をＢｇ／ｃｍ３として次式によって求めた
値を気孔率とした。 ［（Ａ−Ｂ）／Ａ］×１００（％）"Porosity / vol%" The true density of the material used was defined as Ag / cm 3 , the apparent density of the plastic prefilter of the present invention was defined as Bg / cm 3 , and the value determined by the following equation was defined as the porosity. [(AB) / A] x 100 (%)
【００２１】「圧力損失／ｍｍＡｑ」本発明の浄水器プ
レフィルタ用プラスチックフィルタの一方の口を封止
し、他方より真空ポンプで１０ｍ３／ｍ２・ｍｉｎの割
合で吸引し、その時の圧力差を測定した値を圧力損失と
した。[Pressure loss / mmAq] One port of the plastic filter for a water purifier pre-filter of the present invention is sealed, and a vacuum pump is used to suction the other port at a rate of 10 m 3 / m 2 · min. Was measured as pressure loss.
【００２２】「濾過精度」本発明の浄水器プレフィルタ
用プラスチックフィルタの通過後の水道水内の粒子をパ
ーティクルカウンターで計測した。詳しくは、通過後の
粒子数を、粒径１μｍごとに１〜４μｍ、４〜６μｍ、
１０〜２６μｍ、２６〜４０μｍ、４０μｍ以上の群に
分類し、小径の方から粒子数が初めて０になる粒径（μ
ｍ）群の最小粒径を濾過精度とした。"Filtration Accuracy" Particles in tap water after passing through the plastic filter for a water filter prefilter of the present invention were measured by a particle counter. Specifically, the number of particles after passing is set to 1 to 4 μm, 4 to 6 μm for each 1 μm in particle size,
The particles are classified into groups of 10 to 26 μm, 26 to 40 μm, and 40 μm or more.
m) The minimum particle size of the group was taken as the filtration accuracy.
【００２３】「プレフィルタ強度試験」本発明の浄水機
プレフィルタ用プラスチックフィルタ2 の一方の口を流
入側エンドキャップ3 で封止し、ケーシング1 に入れて
流出側エンドキャップ4 で開口状態に固定し水道水を圧
力１０ｍ３／ｍ２・ｍｉｎで通水し、ケーシング1 の破
損の有無を調べた。すなわちケーシング1 が破損しない
ものを（○）、ケーシング1 が破損したものを（×）と
した。[Pre-filter strength test] One port of the plastic filter 2 for the pre-filter of the water purifier of the present invention is sealed with an inflow-side end cap 3, placed in a casing 1, and fixed in an open state with an outflow-side end cap 4. Tap water was passed at a pressure of 10 m 3 / m 2 · min, and the casing 1 was examined for damage. That is, the case where the casing 1 was not damaged was marked with (○), and the case where the casing 1 was damaged was marked with (×).
【００２４】［実施例１］平均粒径が４００μｍで分子
量６００万の超高分子ポリエチレン（ＭＦＲ＝０．０１
以下）を先端部にプラスチックフィルタの外径が２５．
０ｍｍ、内径１５．０ｍｍになるような円筒状開口を有
する口金を設けた異方向コニカル押出機で押出し、溶融
分散粒子の相互間隔有着を該口金で行い気孔率３８ｖｏ
ｌ％、圧力損失１２８ｍｍＡｑの浄水器プレフィルタ用
プラスチックフィルタを得た。表１にこの方法で得たプ
ラスチックプレフィルタの性能、すなわち気孔率・圧力
損失・濾過精度・プレフィルタ強度試験の結果を上記に
示す方法により測定または評価をした結果を示す。表２
にこの方法で得たプラスチックフィルタで圧力損失の測
定を１０回行い、その結果を最大値・最小値・平均値・
バラツキで示す。Example 1 Ultra high molecular weight polyethylene having an average particle diameter of 400 μm and a molecular weight of 6,000,000 (MFR = 0.01)
The plastic filter has an outer diameter of 25.
Extrusion is carried out by an anisotropic conical extruder provided with a base having a cylindrical opening having a diameter of 0 mm and an inner diameter of 15.0 mm.
A plastic filter for a water purifier prefilter having 1% and a pressure loss of 128 mmAq was obtained. Table 1 shows the results of measuring or evaluating the performance of the plastic prefilter obtained by this method, that is, the results of the porosity, pressure loss, filtration accuracy, and prefilter strength test by the methods described above. Table 2
The pressure drop was measured 10 times with the plastic filter obtained by this method, and the results were calculated as the maximum value, minimum value, average value,
Shown by variation.
【００２５】［実施例２］平均粒径が１６０μｍで分子
量６００万の超高分子ポリエチレン（ＭＦＲ＝０．０１
以下）を先端部にプラスチックフィルタの外径が２５．
０ｍｍ、内径１５．０ｍｍになるような円筒状開口を有
する口金を設けた異方向２軸コニカル押出機で押出し、
溶融分散粒子の相互間隔有着を該口金で行い気孔率３０
ｖｏｌ％、圧力損失２５０ｍｍＡｑの浄水器プレフィル
タ用プラスチックフィルタを得た。表１にこの方法で得
たプラスチックプレフィルタの性能を実施例１と同様に
示す。Example 2 Ultra high molecular weight polyethylene having an average particle diameter of 160 μm and a molecular weight of 6,000,000 (MFR = 0.01)
The plastic filter has an outer diameter of 25.
0 mm, extruded with a different direction biaxial conical extruder provided with a base having a cylindrical opening such that the inner diameter becomes 15.0 mm,
Adhesion of the melt-dispersed particles to each other is performed by the die, and the porosity is 30.
A plastic filter for a water purifier prefilter having a vol% of 250% Aq and a pressure loss of 250 mmAq was obtained. Table 1 shows the performance of the plastic prefilter obtained by this method in the same manner as in Example 1.
【００２６】［実施例３］型内焼結法で成形された市販
品の超高分子ポリエチレン系多孔質プレフィルタでテス
トに供した。表１にこのプラスチックプレフィルタの性
能を実施例１と同様に示す。表２に圧力測定のバラツキ
の測定結果を実施例１と同様に測定または評価した結果
を示す。Example 3 A test was performed using a commercially available ultra-high molecular polyethylene-based porous prefilter formed by an in-mold sintering method. Table 1 shows the performance of this plastic prefilter in the same manner as in Example 1. Table 2 shows the results of measuring or evaluating the measurement results of the pressure measurement variation in the same manner as in Example 1.
【００２７】［比較例１］平均粒径が４００μｍで分子
量６００万の超高分子ポリエチレン（ＭＦＲ＝０．０１
以下）を先端部にプラスチックフィルタの外径が２５．
０ｍｍ、内径１５．０ｍｍになるような円筒状開口を有
する口金を設けた異方向コニカル押出機で押出し、溶融
分散粒子の相互間隔有着を該口金で行い気孔率２３ｖｏ
ｌ％、圧力損失６５０ｍｍＡｑの浄水器プレフィルタ用
プラスチックフィルタを得た。表１にこの方法で得たプ
ラスチックフィルタの性能を実施例１と同様に測定また
は評価した結果を示す。Comparative Example 1 Ultra high molecular weight polyethylene having an average particle diameter of 400 μm and a molecular weight of 6,000,000 (MFR = 0.01)
The plastic filter has an outer diameter of 25.
Extrusion is carried out by an anisotropic conical extruder provided with a base having a cylindrical opening having a diameter of 0 mm and an inner diameter of 15.0 mm.
A plastic filter for a water purifier prefilter having 1% and a pressure loss of 650 mmAq was obtained. Table 1 shows the results of measuring or evaluating the performance of the plastic filter obtained by this method in the same manner as in Example 1.
【００２８】[0028]
【表１】 [Table 1]
【００２９】[0029]
【表２】 [Table 2]
【００３０】表１に示したように、実施例１〜２のプラ
スチックフィルタにおいて、濾過精度が５〜１００μｍ
であり、プレフィルタとしての濾過性能上問題無く、実
際の性能試験においても問題ない。As shown in Table 1, in the plastic filters of Examples 1 and 2, the filtration accuracy was 5 to 100 μm.
Therefore, there is no problem in filtration performance as a pre-filter, and there is no problem in an actual performance test.
【００３１】一方、比較例１のフィルタは圧力損失が高
すぎるため、プレフィルタ強度試験でケーシングが破損
し、プレフィルタとしての濾過性能上問題がある。On the other hand, since the pressure loss of the filter of Comparative Example 1 is too high, the casing is damaged in the prefilter strength test, and there is a problem in the filtration performance as the prefilter.
【００３２】なお、実施例３のフィルタにおいては、表
２に示したように、型内焼結法で成形しているためバラ
ツキが大きく、品質が安定しないことも判った。In the filter of Example 3, as shown in Table 2, since it was formed by the in-mold sintering method, it was found that the dispersion was large and the quality was not stable.
【００３３】[0033]
【発明の効果】以上説明したように、本発明の浄水器プ
レフィルタ用プラスチックフィルタは従来の型内焼結法
で成形したプレフィルタに比べ、濾過精度が高く、浄水
器のプレフィルタとして有用である。As described above, the plastic filter for a water filter pre-filter of the present invention has higher filtration accuracy and is useful as a pre-filter for a water purifier as compared with a pre-filter formed by a conventional in-mold sintering method. is there.
【図１】本発明浄水器プレフィルタの一例を示す断面の
正面図。FIG. 1 is a front view of a cross section showing an example of a water filter prefilter of the present invention.
１・・・ケーシング １０・・・浄水器プレフィルタ ２・・・浄水器プレフィルタ用プラスチックフィルタ ３・・・流入側エンドキャップ ４・・・流出側エンドキャップ Ａ・・・流入側 Ｂ・・・流出側 DESCRIPTION OF SYMBOLS 1 ... Casing 10 ... Water purifier pre-filter 2 ... Plastic filter for water purifier pre-filter 3 ... Inflow side end cap 4 ... Outflow side end cap A ... Inflow side B ... Outflow side
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｊ 9/24 ＣＥＳ Ｂ２９Ｋ 23:00 // Ｂ２９Ｋ 23:00 105:04 105:04 Ｂ２９Ｌ 31:14 Ｂ２９Ｌ 31:14 Ｃ０８Ｌ 23:06 Ｃ０８Ｌ 23:06 Ｂ０１Ｄ 29/10 ５０１Ｃ ５１０Ｅ ５３０Ａ Ｆターム(参考） 4D019 AA03 BA13 BB06 BD01 BD10 CA03 CB04 CB06 4F074 AA17 CA52 CC12Y DA02 DA43 4F206 AA06 AC01 AG07 AG20 AH03 JA07 JD04 JL02 JM04 JQ31 4F207 AA04 AA11 AA16 AA21 AG07 AG16 AG20 AH03 KA04 KA17 KK12 KK13 KK36 KL51 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08J 9/24 CES B29K 23:00 // B29K 23:00 105: 04 105: 04 B29L 31:14 B29L 31 : 14 C08L 23:06 C08L 23:06 B01D 29/10 501C 510E 530A F-term (reference) 4D019 AA03 BA13 BB06 BD01 BD10 CA03 CB04 CB06 4F074 AA17 CA52 CC12Y DA02 DA43 4F206 AA06 AC01 J07 AG20 AH04J07 J20 AA11 AA16 AA21 AG07 AG16 AG20 AH03 KA04 KA17 KK12 KK13 KK36 KL51
Claims (4)
成形した多孔質フィルタにおいて、気孔率が２０〜６０
ｖｏｌ％で、濾過精度が５〜１００μｍで、乾式通気量
１０ｍ３／ｍ２・ｍｉｎ時の圧力損失が ２０〜６００
ｍｍＡｑ以下であることを特徴とする浄水器プレフィル
タ用プラスチックフィルタ。1. A porous filter obtained by sintering particles of a thermoplastic material and having a porosity of 20 to 60.
vol%, filtration accuracy is 5 to 100 μm, and pressure loss at a dry air flow rate of 10 m 3 / m 2 · min is 20 to 600.
A plastic filter for a water purifier prefilter, which is not more than mmAq.
超高分子量ポリエチレンであることを特徴とする請求項
１記載の浄水器プレフィルタ用プラスチックフィルタ。2. A plastic filter for a water purifier pre-filter according to claim 1, wherein the material constituting the plastic filter is ultra-high molecular weight polyethylene.
クリュー式、あるいはラム式押出機を利用し、連続多孔
質体を形成することを特徴とする請求項１または２に記
載の浄水器プレフィルタ用プラスチックフィルタの製造
方法。3. The water purifier according to claim 1, wherein the continuous porous body is formed by using a screw type or a ram type extruder provided with a base having a cylindrical opening. Manufacturing method of plastic filter for filter.
ングの内部に請求項１または２に記載した浄水器プレフ
ィルタ用プラスチックフィルタの流入側を流入側エンド
キャップで封止し、流出側を流出側エンドキャップで開
口状態に固定して、流入水が前記プラスチックフィルタ
の筒外から筒内方向に通過する際に比較的大きな不純物
を濾過することを特徴とする浄水器プレフィルタ。4. The plastic filter for a water purifier pre-filter according to claim 1 or 2, wherein an inflow side is sealed with an inflow end cap and an outflow side is outflow inside a casing connectable to an inflow pipe side of the water purifier. A pre-filter for a water purifier, which is fixed in an open state by a side end cap and filters relatively large impurities when inflow water passes from outside the cylinder to inside the plastic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000196947A JP2002011314A (en) | 2000-06-29 | 2000-06-29 | Plastic filter for water cleaner prefilter, its production method, and cleaner prefilter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000196947A JP2002011314A (en) | 2000-06-29 | 2000-06-29 | Plastic filter for water cleaner prefilter, its production method, and cleaner prefilter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002011314A true JP2002011314A (en) | 2002-01-15 |
Family
ID=18695358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000196947A Pending JP2002011314A (en) | 2000-06-29 | 2000-06-29 | Plastic filter for water cleaner prefilter, its production method, and cleaner prefilter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002011314A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005231108A (en) * | 2004-02-18 | 2005-09-02 | Asahi Kasei Chemicals Corp | Washing agent for molding machine |
| JP2006007078A (en) * | 2004-06-24 | 2006-01-12 | Kurita Water Ind Ltd | Water collecting pipe, water collecting pipe unit, and filtering device |
| JP2008163811A (en) * | 2006-12-27 | 2008-07-17 | Denso Corp | Filter and fuel injection valve having this filter |
| JP2019042731A (en) * | 2017-08-29 | 2019-03-22 | 三ツ星ベルト株式会社 | Manufacturing device and manufacturing method of filter molded body |
| CN110039783A (en) * | 2019-04-29 | 2019-07-23 | 太原理工大学 | A kind of air filter and filter method for 3D biometric print machine |
-
2000
- 2000-06-29 JP JP2000196947A patent/JP2002011314A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005231108A (en) * | 2004-02-18 | 2005-09-02 | Asahi Kasei Chemicals Corp | Washing agent for molding machine |
| JP4504699B2 (en) * | 2004-02-18 | 2010-07-14 | 旭化成ケミカルズ株式会社 | Cleaning agent for molding machine |
| JP2006007078A (en) * | 2004-06-24 | 2006-01-12 | Kurita Water Ind Ltd | Water collecting pipe, water collecting pipe unit, and filtering device |
| JP2008163811A (en) * | 2006-12-27 | 2008-07-17 | Denso Corp | Filter and fuel injection valve having this filter |
| JP4682977B2 (en) * | 2006-12-27 | 2011-05-11 | 株式会社デンソー | Filter and fuel injection valve having the same |
| JP2019042731A (en) * | 2017-08-29 | 2019-03-22 | 三ツ星ベルト株式会社 | Manufacturing device and manufacturing method of filter molded body |
| JP6993944B2 (en) | 2017-08-29 | 2022-02-04 | 三ツ星ベルト株式会社 | Manufacturing equipment and manufacturing method for filter molded products |
| CN110039783A (en) * | 2019-04-29 | 2019-07-23 | 太原理工大学 | A kind of air filter and filter method for 3D biometric print machine |
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